Infill shifted (gaps on one site)

Hey fellow Printers,

I printed with Bambulab PETG first time today.
And I noticed some gaps between infill and outline.
Weirdly these Gaps only happen one 2 Sides of the print.
On the other 2 Sides it looks like there is over extrusion.

It looks like the slicer shifted the infill a bit, so that there are gaps on one site and over extrusion on the other side.

Has anybody else ever seen this ?

On the picture: lower right corner has gaps.
Upper left corner not.

The shorter the lines are, the worst the lines get